https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13974211Edit ImageSaveSaveEditCropCustom TextFriedrich Heinrich Alexander von Humboldt. Photogravure after F. G. Weitsch, 1806.Original public domain image from Wellcome CollectionMorePublic DomainFree CC0 image for Personal and Business useInfoView CC0 LicenseJPEGSmall JPEG 909 x 1200 px | 300 dpiLarge JPEG 2390 x 3154 px | 300 dpiFree DownloadFriedrich Heinrich Alexander von Humboldt. Photogravure after F. G. Weitsch, 1806.More